Traction wheel for tractors or the like



Nov. 22, 1949 N. E. ROHAN I TRACTION WHEEL FOR TRACTQRS OR THE LIKE 2 Sheeis-Sheet 1 Filed June 17, 1948 Norman E. Ro/mn IN VENTOR.

TRAEITION WHEEL FOR TRACTORS OR THE LIKE Filed June 17, 1948 2 Sheets-Sheet 2 Fig. 2.

Fig.3.

Norman E. Rohan IN VENT OR.

BY AI W -MW Patented Nov. 22, 1949 TKAGTION WHEEL FOR PR'ACTUR S- COR THE BIKE" I LNormanTEIRohamlnez, Tex. 7 Application 611M 17, 1948, Serial No. 33,479

11 The present invention 1 relates .to new-i and use ful i improvements 3 in traction wheel's and other motor'vehicles and more'particularly to an emergency' or accessory tractioniwheeh which; may :be attached in position tozthezusuah drive wheel of the tractor.

Animportantzobject ofzthe invention i'sito pro-- 7 vide aa-tractionzwheel of thi's'characteri including agplurality of retractable lugs; to provideitraotion for? the 'tractorrwhen travellingioverssoftzorz mud dygground; or throughsnow.

A further object :of the r inventionvis ato mrov-ide doublersets :of retractable; lugs for'usein providing the: necessary tractionuwhen:the'vehicleiis travellingcforwardly orrearwardly. V

v 'Another obj ect-oi .thei invention::.is to-: provide spring: means'f or holding the lugs 1in.:a .proje'cted position and connecting a:pairtofithedugszatrsub= stantially. diametrically iopp'osite ssides 50f: Lthe Wheels to each i otherfiwhereby" toazutilize'ca; :single' spring foriholdingla painofthe lugsin azpizdieoted position.

, Another-object is -toxprovidezaadevicezof this character of. simple and practicalconstruction; which is." efficient and-reliable in use,w=.easyeto:attach" imposition: to :a i tractomvheel wi-thoutsnecese sitating -a-ny changestor alterations tin-9 theconstruction of the tractor and .which is otherwise wellzadapted forthe. purposes for. which=.the-same is intended.

-Other objects andadvantagesreside in therdetails ofloonstructiomand operationlas miore fully hereinafter described: and claimed, reference-being had to the accompanyingtdravvings forming part hereof, wherein like inumeralsnreier. to like partsthroughout, and in which:v

Figure 1 is a side elevationalview; v

Figure 2 isa transverse sectional-viewtaken substantially on aline 2.2 of Figure 1;

Figure: Bis an end elevational view, and Figure .4-is.a perspective .view ofthe attaching plate for attaching the .emergencywheelwto the tractor wheel.

Referring now to the drawings in. detailwherein for .the. purpose of illustration iI ihave .disclose'dla preferred embodiment of thelinventionjtheinumerals I andfi designate'inner and outer rings forming the rim of'the emergencyitracti'on wheel, the rings being connected toeaeh other'in spaced apart relation by transverse bolts Thaving spac cessoryxwheeladjacent theinner-ringzli as shown iniFigure -2Lofat-he drawings. Thehubgpor-tion N) is formed with belt attaching :op'enings :H by means nif \whichithe attaching. plate T9 is-rssecured to theihub :of a tractor wheelior other vehicle: and Withwthe :inner ring 5'. positioned z'cioselzy t-against the'tractormheel. V

' ."I he a accessory traction wheelv is alsogprovided with groups of bolts or rods' splr2 ,,il3 andv 3411105?! tioned. transversely between the rings-:5 :ami' 6, theibfiil'tl t3 lofieachr group providing a; pivot for-wthe rolled ahinge bearings I !;5 and l 6: atthe inner ends of: pairs: of forwarm and reversing lugs' 5 I! and: It.

The lugspi'lzand' it" are .tconstructed of .Irigid sheet: metal: platesi naving, the bearings I5-=and 458 formed; at one" end: andsiextending. in circumferentially opposite directions fromftheipivotiboltl[ 31 .The portions of 1th9"1'llgs adjacent the bearings lf5@and:* [5' are curved: corresponding, substantially to:.the radiusofrringsfi and:firandipositionedube tween -sa id ringswhile -the oppositewends of sthe Inger-project substantially radially. inwardlyjinzan are as shown at: t9 andformed atItheirinner ends with hcok shaped l-ips i201 engaged respeictivelyabehind: thebolts I2 and i4.

'thezl-ip 2-0 ofslugl 8 isweldedb'etweenwthe outer endiportionswofa -U-shaped g,uide 2:1 having an opening. ;2 2': at .its big-ht portion in which: onewend ofxa maize-(1s slidably receivedf :Aiicoilspringe-fl -is1';positi0nedbetween washers: 2 5": and :26 on. red 23:, the washer ;2-5-.bearing,-:againstithewinner ends of U-shaped guide 2! and the washer zfiabeing fi'xedrtor-the rodi23. v 1 .Theriotheri end; ofi=rod 23 extendstoward a -substantial-ly:diametrically opposite sideLof-the wheel and; is connected-ito the. lip 2t atzthe inwardly provjecting; end: of the log I lof "21256601101; pairofathe lugs Joy/means of. 1a;- .pair of. spaced, parallel Zap er- ,turedx e ars 'rz l welded-.to -the.- lip and 1110 whichethe adjacenttend of trod. i23vispivotally attachedgb means of. a pin,28-.. 8 V:

iAccordinglythel-ugtI i Whichma-y be designated for/providing traction .forthe-teh'icle.duringgits forward 'niovenient is! connected to. oneof the lugs L8- Icy-the. to d 23' and the spring 25 ;carriedllby .the rod projects both. of the connected lugs; IT and" I8 outwardly of the periphery i (if the wheel, it being apparentithat'only one disaid 'connectedljug sbe- 'ingin engagement with'the groundldur'ihgrota! tion of the Wheel. The lug I8 is usedftoprovide tracti'onwhen' the vehicle" is travelling in a rearwardor'reverse direction; When one oft'h'e'connected'lugs jprovf des traction for the wheelits adjacent: advancegflug is retracted to :a position tion In recessed inwardly at the side of the acinwardlyioifthe peripheryof"the'wheel'when saiti last named 'lug comes intocontact with the 3 ground. In this manner the lug which is retracted will enable the rim of the wheel to ride on the surface of the ground and thus enable the following traction lugs to penetrate into the ground by reason of its angle of approach and thus provide the necessary traction for the wheel.

The rods 23 for the connected pairs of lugs l1 and I8 are slidable at their central portions in guides 29 carried at the hub portion 3a of a spider 3| which includes spokes 32 attached at their outer ends to the ring 6 by means of the bolts 13.

The spider 3l' may be of a sectional construction as shown in Figure 1 of the drawings and with the hub portion of each section connected together by means of plates 33 and bolts and nuts 34.

Also as indicated in Figure 2 of the drawings certain of the guides 29 are positioned inwardly of the hub 30 of the spider and the remaining guides 29 are positioned outwardly of the hub of the spider to prevent interference of the action of the rods 23 with each other.

In view of the foregoing description taken in conjunction with the accompanying drawings it is believed that a, clear understanding of the device will be quite apparent to those skilled in this art. A more detailed description is accordingly deemed unnecessary.

It is to be understood, however, that even though there is herein shown and described a preferred embodiment of the invention the same is susceptible to certain changes fully comprehended by the spirit of the invention as herein described and the scope of the appended claims.

Having described the invention, what is claimed as new is:

1. An emergency traction wheel comprising a pair of rings, means securing the rings to each other in spaced parallel relation to each other, transverse members extending between the rings, and traction lugs pivoted to said transverse members for retracting movement between the rings, said lugs being arranged in pairs with one end pivoted to a common transverse member and extending circumferentially in opposite directions therefrom to form forward and reverse traction lugs respectively, the other ends of said lugs projecting substantially radially inwardly between the rings, and spring means holding the lugs in projected position beyond the periphery of the rings.

2. An emergency traction wheel comprising a pair of rings, means securing the rings to each other in spaced parallel relation to each other, transverse members extending between the rings, and traction lugs pivoted to said transverse members for retracting movement between the rings, said lugs being arranged in pairs with one end pivoted to a common transverse member and extending circumferentially in opposite directions therefrom to form forward and reverse traction lugs respectively, the other ends of said lugs projecting substantially radially inwardly between the rings, spring means holding the lugs in projected position beyond the periphery of the rings, and an attaching plate carried by one of the rings for attaching the emergency wheel to a vehicle wheel.

3. An emergency traction Wheel comprising a pair of rings, means securing the rings to each other in spaced parallel relation to each other, transverse members extending between the rings, and traction lugs pivoted to said transverse members for retracting movement between the rings, said lugs being arranged in pairs with one end pivoted to a common transverse member and extending circumferentially in opposite directions therefrom to form forward and reverse traction lugs respectively, the other ends of said lugs projecting substantially radially inwardly between the rings, and means connecting the forward traction lug of one pair to the reverse traction lug of another pair and including spring means common to said connected lugs for holding the lugs in a projected position beyond the periphery of the rings.

4. An emergency traction wheel comprising a pair of rings, means securing the rings to each other in spaced parallel relation to each other, transverse members extending between the rings, and traction lugs pivoted to said transverse members for retracting movement between the rings, said lugs being arranged in pairs with one end pivoted to a common transverse member and extending circumferentially in opposite directions therefrom to form forward and reverse traction lugs respectively, the other ends of said lugs projecting substantially radially inwardly between the rings, and means connecting one of the lugs of one pair to an opposite lug of another pair and including a rod pivoted at one end to one of the connected lugs and slidably engaged at its other end with the other of said connected lugs, and spring means carried by the rod and holding both of said connected lugs in a projected position beyond the periphery of the rings.

5. An emergency traction wheel comprising a pair of rings, means securing the rings to each other in spaced parallel relation to each other, transverse members extending between the rings, and traction lugs pivoted to said transverse members for retracting movement between the rings, said lugs being arranged in pairs with one end pivoted to a common transverse member and extending circumferentially in opposite directions therefrom to form forward and reverse traction lugs respectively, the other ends of said lugs projecting substantially radially inwardly between the rings, and means connecting one of the lugs of one pair to an opposite lug of another pair and including a rod pivoted at one end to one of the connected lugs and slidably engaged at its other end with the other of said connected lugs, a spider secured to one of the rings, a guide carried by the spider for the rod, and spring means carried by the rod and holding both of said connected lugs in a projected position beyond the periphery of the rings.

6. An emergency traction wheel comprising a pair of rings, means securing the rings to each other in spaced parallel relation to each other, transverse members extending between the rings and traction lugs pivoted to said transverse members for retracting movement between the rings, said lugs being arranged in pairs with one end pivoted to a common transverse member and extending circumferentially in opposite directions therefrom to form forward and reverse traction lugs respectively, the other ends of said lugs projecting substantially radially inwardly between No references cited. 

